Subgroup analyses were conducted in CHARLS across multiple factors, including gender, smoking, drinking, rural residence, marital status, education level, MetS, hypertension, diabetes, dyslipidemia, liver disease, heart disease, kidney disease, digestive disease, psychiatric disease, cognitive disease, BMI, triglyceride‐glucose (TyG) index, and CRP. The gene discussed is CRP; the disease is kidney disorder.